The volcano last erupted in 1963 when it killed 1,100 people.
Mount Agung could erupt imminently officials have warnedWhen is Mount Agung expected to erupt?
Officials started detecting shallow tremors in late August.
The government has imposed a 12 kilometer (7.5 miles) exclusion, or "danger zone" around the volcano, according to the Associated Press.People who live in the area are being warned to prepare masks and other gear that could protect their nose, mouth and eyes.More news: Vatican signs treaty to ban nuclear weapons
"Mount Agung is entering a critical phase", Sutopo Purwo Nugroho, spokesman for the National Disaster Mitigation Agency, said in a statement issued on September 26 after the government raised the status of the 3,031-meter-high volcano on September 22 following an increase in volcanic activity.
Evacuees are now living in temporary shelters, sport centres, village halls and with friends or family - but some have been returning to the danger zone during the day to tend to their livestock. President Joko Widodo is scheduled to visit evacuees at several camps on Tuesday. While most come from Australia, China and Japan, an estimated 330,000 Britons also travel to Indonesia every year.
She said: "The tourists I have spoke to seem very anxious, I think this is due to having a better understanding and awareness about the dangers involved with an eruption".
Aircraft have been advised to avoid the area but so far no flights have been canceled.More news: China announces imposition of oil sanctions on North Korea from Oct 1
"Also they are anxious about the airport closing because an eruption is imminent".
Mount Agung is one of many active volcanoes in the ring of fire, a string of volcanoes and seismic activity that runs through the Indonesian archipelago and the edges of the Pacific Ocean. "The only records that we have is of the phenomena that were observed and reported by people around the volcano prior to the 1963 eruption".
"I think it could happen but.maybe we'd have to stay here a couple more days, so nothing to worry about", he said.
Bali International Airport will likely be closed in the case of an eruption, but it'll depend on whether volcanic material is considered to be a hazard to flights.More news: Flipkart Big Billion Day vs Amazon Great Indian Festival
But several countries, including the US, the United Kingdom and Australia, have warned their citizens against traveling to Bali in case of an eruption.